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DS_S48SA05006_06022006
[]
ΚΩ−
∆
−
∆
+
=− 1.73
%Vo
up
1690%)100(69 Vo
x. When trim-up +10% (5V X 1.1 = 5.5V)
Rtrim
E
[]
ΚΩ=−
−
+
=− 9.5161.73
10
up
1690)10100(69
Care should be taken to ensure that the maximum
utput Voltage Adjustment (TRIM)
o increase or decrease the output voltage set point, the
Rtrim
output power of the module remains at or below the
maximum rated power.
O
T
modules may be connected with an external resistor
between the TRIM pin and either the Vo+ or Vo -. The
TRIM pin should be left open if this feature is not used.
Figure 15: Circuit configuration for trim-down (decrease output
the external resistor is connected between the TRIM
voltage)
If
and Vo- pins, the output voltage set point decreases.
The external resistor value required to obtain a
percentage of output voltage change △Vo% is defined
as:
[]
ΚΩ
∆
1.73
%Vo
down
1690
−=−
x. When trim-down –10% (5V X 0.9 = 4.5V)
Rtrim
E
[]
ΚΩ
9.951.73
10
down
1690
=−=−
Rtrim
Figure 16: Circuit configuration for trim-up (increase output
the external resistor is connected between the TRIM
voltage)
If
and Vo+the output voltage set point increases. The
external resistor value required to obtain a percentage
output voltage change △Vo% is defined as:
8